856
FNCA52 TJSJ 290759
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
359 AM AST THU JAN 29 2026
DISCUSSION
VARIABLE WEATHER CONDITIONS WILL PERSIST ACROSS THE AREA, WITH
FLUCTUATIONS IN MOISTURE. HOWEVER, SOME BRIEF PERIODS OF LOWER
RELATIVE HUMIDITY ARE EXPECTED OVER USUAL AREAS OF SOUTHERN PUERTO
RICO, WITH VALUES DROPPING INTO THE MID-50S. SURFACE WINDS ARE
LOWER, BUT STILL SUSTAINED WINDS UP TO 15 MPH WITH HIGHER GUSTS
ARE POSSIBLE ACROSS THE MENTIONED AREAS. DESPITE THE INCREASES IN
MOISTURE, FUELS REMAIN ON THE DRIER SIDE, SUPPORTING FAVORABLE
FIRE-WEATHER DISPERSION. HOWEVER, FIRE-WEATHER CONDITIONS WILL
REMAIN LOW TO MODERATE TODAY.
PRZ014-300800-
SOUTHEAST COASTAL PLAINS-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 86 (+1) 66 (-3) 87
RH % (24H TREND) 56 (-3) 94 (+1) 57
WIND 20FT/EARLY(MPH) SE 10 NE 9 SE 14 G20
WIND 20FT/LATE(MPH) SE 10 NE 9 SE 14 G20
MIXING HGT(FT-AGL/MSL)4060 4440
TRANSPORT WND (MPH) SE 8 E 13
VENT RATE (KT-FT) 28420 48840
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-300800-
SOUTHERN HILLS-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 30
TEMP (24H TREND) 82 (+2) 63 (-4) 83
RH % (24H TREND) 61 (-4) 98 (+4) 63
WIND 20FT/EARLY(MPH) SE 8 E 8 SE 11
WIND 20FT/LATE(MPH) SE 8 E 8 SE 11
MIXING HGT(FT-AGL/MSL)4690 4660
TRANSPORT WND (MPH) SE 7 E 10
VENT RATE (KT-FT) 28140 41940
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-300800-
NORTH COASTAL PLAINS-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 10 40
TEMP (24H TREND) 86 (+2) 66 (-2) 86
RH % (24H TREND) 57 (-6) 100 (+2) 61
WIND 20FT/EARLY(MPH) E 10 E 12 E 14 G17
WIND 20FT/LATE(MPH) E 10 E 12 E 14 G17
MIXING HGT(FT-AGL/MSL)4190 4120
TRANSPORT WND (MPH) SE 5 E 12
VENT RATE (KT-FT) 16760 41200
DISPERSION 5 5
DSI 5 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-300800-
NORTHERN HILLS-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 50 0 50
TEMP (24H TREND) 84 (+1) 63 (-3) 85
RH % (24H TREND) 59 (-1) 99 (+2) 58
WIND 20FT/EARLY(MPH) NE 8 E 10 E 12
WIND 20FT/LATE(MPH) NE 8 E 10 E 12
MIXING HGT(FT-AGL/MSL)4690 4550
TRANSPORT WND (MPH) SE 2 E 9
VENT RATE (KT-FT) 9380 36400
DISPERSION 4 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-300800-
WEST COAST-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 85 (0) 65 (-3) 87
RH % (24H TREND) 62 (+2) 100 (+5) 59
WIND 20FT/EARLY(MPH) SE 9 E 12 SE 11
WIND 20FT/LATE(MPH) SE 9 E 12 SE 11
MIXING HGT(FT-AGL/MSL)4580 3700
TRANSPORT WND (MPH) SE 8 E 7
VENT RATE (KT-FT) 32060 22200
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-300800-
EASTERN INTERIOR-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 50
TEMP (24H TREND) 84 (+3) 64 (-4) 84
RH % (24H TREND) 59 (-6) 100 (+2) 64
WIND 20FT/EARLY(MPH) SE 9 SE 8 SE 11
WIND 20FT/LATE(MPH) SE 9 SE 8 SE 11
MIXING HGT(FT-AGL/MSL)4730 4860
TRANSPORT WND (MPH) SE 6 E 12
VENT RATE (KT-FT) 23650 48600
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-300800-
LUQUILLO MOUNTAIN RANGE-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 60
TEMP (24H TREND) 79 (+2) 64 (-2) 79
RH % (24H TREND) 63 (-8) 100 (+1) 71
WIND 20FT/EARLY(MPH) SE 8 E 6 SE 9
WIND 20FT/LATE(MPH) SE 8 E 6 SE 9
MIXING HGT(FT-AGL/MSL)3890 4100
TRANSPORT WND (MPH) SE 7 E 13
VENT RATE (KT-FT) 23340 45100
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-300800-
CENTRAL MOUNTAIN RANGE-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 0 40
TEMP (24H TREND) 81 (+2) 61 (-4) 82
RH % (24H TREND) 62 (0) 100 (+3) 60
WIND 20FT/EARLY(MPH) SE 5 E 9 SE 8
WIND 20FT/LATE(MPH) SE 5 E 9 SE 8
MIXING HGT(FT-AGL/MSL)5430 5360
TRANSPORT WND (MPH) SE 5 SE 6
VENT RATE (KT-FT) 21720 26800
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-300800-
CAYEY MOUNTAIN RANGE-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 40
TEMP (24H TREND) 79 (+2) 64 (-2) 78
RH % (24H TREND) 65 (-6) 100 (0) 71
WIND 20FT/EARLY(MPH) SE 6 E 5 E 10
WIND 20FT/LATE(MPH) SE 6 E 5 E 10
MIXING HGT(FT-AGL/MSL)4330 4630
TRANSPORT WND (MPH) SE 6 E 13
VENT RATE (KT-FT) 21650 50930
DISPERSION 4 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-300800-
VIEQUES-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 60
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 53 (-5) 96 (+7) 59
WIND 20FT/EARLY(MPH) SE 8 E 11 E 11
WIND 20FT/LATE(MPH) SE 8 E 11 E 11
MIXING HGT(FT-AGL/MSL)3500 3060
TRANSPORT WND (MPH) SE 12 E 15
VENT RATE (KT-FT) 35000 39780
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-300800-
CULEBRA-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 50
TEMP (24H TREND) 85 (0) 72 (-3) 85
RH % (24H TREND) 55 (-6) 92 (+9) 60
WIND 20FT/EARLY(MPH) SE 8 E 11 E 12
WIND 20FT/LATE(MPH) SE 8 E 11 E 12
MIXING HGT(FT-AGL/MSL)3480 3160
TRANSPORT WND (MPH) SE 12 E 15
VENT RATE (KT-FT) 34800 41080
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-300800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 10
TEMP (24H TREND) 87 (+1) 66 (-4) 88
RH % (24H TREND) 56 (-1) 95 (+6) 56
WIND 20FT/EARLY(MPH) SE 12 E 11 SE 17 G22
WIND 20FT/LATE(MPH) SE 12 E 11 SE 17 G22
MIXING HGT(FT-AGL/MSL)4360 4100
TRANSPORT WND (MPH) SE 10 E 13
VENT RATE (KT-FT) 39240 45100
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-300800-
SAINT THOMAS AND SAINT JOHN-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 50
TEMP (24H TREND) 85 (+1) 71 (-4) 85
RH % (24H TREND) 52 (-8) 96 (+14) 60
WIND 20FT/EARLY(MPH) SE 8 E 11 E 12
WIND 20FT/LATE(MPH) SE 8 E 11 E 12
MIXING HGT(FT-AGL/MSL)3400 3200
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 30600 44800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-300800-
ST CROIX-
359 AM AST THU JAN 29 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 40
TEMP (24H TREND) 86 (+1) 71 (-3) 86
RH % (24H TREND) 57 (-5) 98 (+13) 61
WIND 20FT/EARLY(MPH) E 8 E 11 E 12
WIND 20FT/LATE(MPH) E 8 E 11 E 12
MIXING HGT(FT-AGL/MSL)3870 4050
TRANSPORT WND (MPH) E 8 E 15
VENT RATE (KT-FT) 27090 52650
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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